Castille, a former Philadelphia district attorney, has served on the state's highest court for two decades and as chief justice since 2008. He will be forced to retire at the end of 2014, when he reaches the mandatory retirement age of 70.

Baer, a former Allegheny County judge, Panella, a former Northampton County judge, and Gantman, a former Montgomery County lawyer, were elected to their first terms in 2003.